A suspect representing himself in court in connection with two Boston rapes questioned the victims in the case.

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Marcos Colono, 36, struggled Friday to cross-examine a series of Boston police officers about their investigation of the sexual assault of two women, who were attacked at knifepoint in their Allston apartment in September 2008.

The prosecution showed jurors a series of photos from the crime scene, including a sewing machine with a fingerprint on it. Investigators connected Colono to the case after he was arrested for the sexual of a 11-year-old boy in Cambridge in 2010.

The boy's father, a Harvard researcher, was nearly decapitated in the attack.

Colono's DNA from that scene matched DNA from the Allston rapist, who -- until that point -- had been unidentified.

He is already serving a sentence of more than 74 years in that case.

The court has made accommodations, like removing staples – potential weapons – from legal documents so Colono can use them later.